RDD Series
DC-DC Converter
XP Power
8 Watts
xxx Series
• Wide Input Range for Railway Applications
• Single and Dual Outputs
• DIP24 Package
• -40 °C to +85 °C Operation
• Full Load at 70 °C Ambient
• 3000 VDC Isolation
• MTBF >800 kHrs
• 3 Year Warranty
• EN50155 Approval for Railway Applications
Dimensions:
• EN50121-3-2 EMC for Railway Applications
RDD:
1.25 x 0.80 x 0.42” (31.8 x 20.3 x 10.7 mm)
Models & Ratings
Input Voltage
13-70 V
42-176 V
Input current
No Load
Full Load
Output
Voltage
Output Current
Overvoltage level
Maximum
capacitive load
Efficiency
3V3
2400 mA
3.9 V
30 mA
5V
1600 mA
6.2 V
20 mA
398 mA
1330 μF
83%
RDD0824S3V3
388 mA
1330 μF
86%
12 V
665 mA
15 V
RDD0824S05
10 mA
392 mA
330 μF
85%
15 V
535 mA
RDD0824S12
18 V
10 mA
389 mA
220 μF
86%
±5 V
RDD0824S15
±800 mA
±6.2 V
10 mA
402 mA
±900 μF
83%
RDD0824D05
±12 V
±335 mA
±15 V
10 mA
395 mA
±220 μF
85%
RDD0824D12
±15 V
±265 mA
±18 V
10 mA
386 mA
±100 μF
86%
RDD0824D15
3V3
2400 mA
3.9 V
10 mA
89 mA
1330 μF
81%
RDD08110S3V3
5V
1600 mA
6.2 V
10 mA
87 mA
1330 μF
84%
RDD08110S05
12 V
665 mA
15 V
5 mA
87 mA
330 μF
84%
RDD08110S12
15 V
535 mA
18 V
5 mA
88 mA
220 μF
83%
RDD08110S15
±5 V
±800 mA
±6.2 V
5 mA
91 mA
±900 μF
80%
RDD08110D05
±12 V
±335 mA
±15 V
5 mA
90 mA
±220 μF
82%
RDD08110D12
±15 V
±265 mA
±18 V
5 mA
88 mA
±100 μF
83%
RDD08110D15
(1)
(2)
Model Number
Notes
1. Input currents measured at nominal input voltage.
2. Typical value at full load and nominal input
Mechanical Details
Pin Connections
1.25
(31.75)
0.90
(22.86)
12
0.80
(20.32)
3
9
0.60
(15.24)
Bottom View
0.12 (3.05) Min.
23
22
16
0.10
(2.54)
1
11
0.42 (10.70)
DIA
0.02
(0.50)
14
0.20
(5.08)
www.xppower.com
Pin
Single
Dual
1 Remote On/Off Remote On/Off
2
-Vin
-Vin
3
-Vin
-Vin
9
No Pin
Common
11
N.C.
-Vout
14
+Vout
+Vout
16
-Vout
Common
22
+Vin
+Vin
23
+Vin
+Vin
Notes
1. All dimensions are in inches (mm)
2. Weight: 0.039 lbs (18 g) approx.
3. Pin diameter: 0.02±0.002 (0.5±0.05)
4. Pin pitch tolerance: ±0.014 (±0.35)
5. Case tolerance: ±0.02 (±0.5)
RDD Series
DC-DC Converter
XP Power
Input
Characteristic
Input Voltage Range
Input Filter
Minimum
Maximum
Units
Notes & Conditions
13
Typical
70
VDC
24 V nominal
42
176
VDC
110 V nominal
100
VDC for 1000 ms
24 V models
185
VDC for 1000 ms
110 V models
Maximum
Units
Notes & Conditions
15
VDC
See Models and Ratings table
±1
%
At 70% load
%
Minimum load required to meet specification. Operation at
no load will not cause damage.
Pi type
Input Reflected Ripple Current
20
mA pk-pk
Input Surge
Through 12 μH inductor and 33 μF capacitor
Output
Characteristic
Minimum
Output Voltage
3.3
Typical
Initial Set Accuracy
Minimum Load
0
Line Regulation
±0.5
%
Load Regulation
±0.5
%
From 0% to full load
On dual output models, when one output is at 25% load
and other is varied from no load to full load
Cross Regulation
±5
%
Ripple & Noise
75
mV pk-pk
Short Circuit Protection
Continuous hiccup mode, with auto recovery
Maximum Capacitive Load
See Models and Ratings table
Temperature Coefficient
0.02
Overload Protection
160
%/ ˚C
%
Of nominal output current
Overvoltage Protection
Remote On/Off
20 MHz bandwidth. Measured using 0.1 μF ceramic capacitor
See Models and Ratings table
Output turns off if remote on/off (pin 1) is shorted to -Vin (pin 2,3)
Output is on if remote on/off (pin 1) is open or >3 V
Start Up Time
30
40
ms
Nominal Vin and constant resistive load
Typical
Maximum
Units
86
%
General
Characteristic
Efficiency
Isolation: Input to Output
Minimum
80
3000
330/220
kHz
1000
14
Power Density
800
Weight
24 V / 110 V models
Ω
109
Isolation Capacitance
Mean Time Between Failure
See Models and Ratings table
VDC
Switching Frequency
Isolation Resistance
Notes & Conditions
pF
Win3
kHrs
0.039 (18)
MIL-HDBK-217F, +25 °C GB
lb (g)
Environmental
Characteristic
Maximum
Units
Operating Temperature
Minimum
-40
Typical
+85
°C
Storage Temperature
-55
+125
°C
Case Temperature
Humidity
+105
°C
95
%RH
Cooling
Notes & Conditions
Derate from 100% load at +70 °C to 50% at +85 °C
Non-condensing
Natural convection
Safety Approvals
Safety Agency
EN
Safety Standard
EN50155
Railway Applications
LVD
Evaluated to EN62368-1
CE
Meets all applicable directives
UKCA
Meets all applicable legislation
www.xppower.com
2
RDD Series
DC-DC Converter
XP Power
EMC: Emissions
Phenomenon
Standard
Test Level
Notes & Conditions
0.15-0.50 MHz, 99 dB μV
0.50-30.0 MHz, 93 dB μV
Conducted
EN50121-3-2
RDD0824 models also meet EN55022 Class A. See
application note to meet EN55022 Class A for RDD08110
models.
30.0-230.0 MHz, 40 dB μV
230.0-1000.0 MHz, 47 dB μV
Radiated
EMC: Immunity
Phenomenon
Standard
Test Level
Criteria
ESD Immunity
EN50121-3-2
Air ±8 kV, Contact ±6 kV
A
Notes & Conditions
Radiated Immunity
EN50121-3-2
20 Vrms/m
A
EFT/Burst
EN50121-3-2
2 kV
A
External input capacitor required, see application note
Surges
EN50121-3-2
2 kV
A
External input capacitor required, see application note
Conducted Immunity
EN50121-3-2
10 V
A
Magnetic Fields
EN61000-4-8
10 A/m
A
Mechanical Details
Pin Connections
1.25
(31.75)
Pin
Single
Dual
1 Remote On/Off Remote On/Off
2
-Vin
-Vin
3
-Vin
-Vin
9
No Pin
Common
11
N.C.
-Vout
14
+Vout
+Vout
16
-Vout
Common
22
+Vin
+Vin
23
+Vin
+Vin
0.90
(22.86)
12
0.80
(20.32)
DIA
0.02
(0.50)
3
9
11
0.60
(15.24)
Bottom View
23
22
16
0.42 (10.70)
0.12 (3.05) Min.
14
Notes
0.20
(5.08)
0.10
(2.54)
1. All dimensions are in inches (mm)
2. Weight: 0.039 lbs (18 g) approx.
3. Pin diameter: 0.02±0.002 (0.5±0.05)
4. Pin pitch tolerance: ±0.014 (±0.35)
5. Case tolerance: ±0.02 (±0.5)
Application Note
External Filter for Surge and EFT
EMI Filter for RDD08110 models
+ Vout
+ Vout
+ Vin
C1
C2
+ Vin
Load
RDD
-Vin
-Vout
For RDD0824 models, C1 = 330 µF, 100 V and C2 not fitted
For RDD08110 models, C1 and C2 = 100 µF, 250 V
3
C1
C2
C3
Load
RDD
-Vin
-Vout
C1, C2, & C3 are 1 µF, 250 V multilayer ceramic Chip Capacitor, placed as close
as possible to the input pins
www.xppower.com
29 Oct 2021
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